Ruby in a Nutshell: A Desktop Quick Reference (In a Nutshell by Yukihiro Matsumoto

By Yukihiro Matsumoto

Ruby is a completely natural object-oriented scripting language written in C and designed with Perl and Python functions in brain. whereas its roots are in Japan, Ruby is slowly yet absolutely gaining floor within the US. The target of Yukihiro Matsumoto, author of Ruby and writer of this e-book, is to include the strengths of languages like Perl, Python, Lisp and Smalltalk. Ruby is a real try and mix the simplest of every thing within the scripting global. on the grounds that 1993, Ruby mailing lists have been confirmed, web content have shaped, and a group has grown round it. The language itself is excellent at textual content processing and is remarkable for its wide item orientation. Ruby is moveable and runs less than GNU/Linux (and different Unices) in addition to DOS, MS home windows and Mac.With Ruby in a Nutshell, Matsumoto bargains a realistic connection with the good points of this new language together with the command-line innovations, syntax, integrated variables, features, and lots of frequent periods and modules. This advisor covers the present good model of Ruby (1.6), but is acceptable to the improvement model 1.7 and the following deliberate sturdy model 1.8. you can find a radical description of Ruby's language syntax, and an outline of the middle performance equipped into the traditional Ruby interpreter, which has extra than 800 integrated equipment in forty two periods and modules.Ruby unearths its energy via its integrated libraries, and this convenient quantity take you thru the various valuable libraries that include the normal Ruby distribution--from community entry through HTTP and CGI programming, to info endurance utilizing the DBM library. This publication concludes with assurance of the original instruments that include Ruby, together with the debugger, profiler, and irb (or interactive ruby.)Find out how Ruby combines the strengths of different languages, and why it has captured the curiosity of such a lot of open resource programmers. As a part of the winning "in a nutshell" sequence of books from O'Reilly & affiliates, Ruby in a Nutshell is for readers who desire a unmarried machine reference for all their needs.

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Ruby in a Nutshell: A Desktop Quick Reference (In a Nutshell (O'Reilly))

Ruby is a fully natural object-oriented scripting language written in C and designed with Perl and Python functions in brain. whereas its roots are in Japan, Ruby is slowly yet absolutely gaining floor within the US. The aim of Yukihiro Matsumoto, writer of Ruby and writer of this publication, is to include the strengths of languages like Perl, Python, Lisp and Smalltalk.

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Invoking methods and class methods of Dir, IO, File, and FileTest for tainted arguments is prohibited. ‚óŹ Invoking test, eval, require, load, and trap methods for tainted argument is prohibited. Level 2 In this level, potentially dangerous operations on processes and files are forbidden, in addition to all restrictions in level 1. The following operations are prohibited: Dir::chdir Dir::chroot Dir::mkdir Dir::rmdir File::chown File::chmod File::umask File::truncate File#lstat File#chmod File#chown File#truncate File#flock IO#ioctl IO#fctrl Methods defined in the FileTest module Process::fork Process::setpgid Process::setsid Process::setpriority Process::egid= Process::kill load from a world-writable directory syscall exit!

As with a begin block, a method definition may end with rescue, else, and ensure clauses. 2 Singleton Methods In Ruby, methods can be defined that are associated with specific objects only. Such methods are called singleton methods. Singleton methods are defined using def statements while specifying a receiver. Defines a singleton method associated with a specific object specified by a receiver. The receiver may be a constant (literal) or an expression enclosed in parentheses. ]] [=> variable code ]...

ENV can be handled as a hash. , i686-linux. , 2001-09-19. 5. STDERR Standard error output stream. Default value of $stderr. STDIN Standard input stream. Default value of $stdin. STDOUT Standard output stream. Default value of $stdout. TOPLEVEL_BINDING A Binding object at Ruby's top level. 3 Built-in Functions Since the Kernel module is included by Object class, its methods are available everywhere in the Ruby program. They can be called without a receiver (functional form), therefore, they are often called functions.

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